【摘要】 采用超声微波共沉淀法制备一系列纳米正极材料Li_1.2Ni_0.2Mn_0.6O₂.通过X射线衍射、扫描电镜、X射线光电子能谱和电化学方法研究超声时间对合成材料的影响.结果表明反应2 h时,材料表现出最优异的电化学性能,其在0.1C和2C倍率下的容量分别为265、180 mAh/g.更多还原

【Abstract】 A series of nanocrystalline lithium-rich cathode materials(Li_1.2Ni_0.2Mn_0.6O₂) have been prepared via an ultrasonic/microwave-assisted co-precipitation method.The effects of the ultrasonic time are emphatically investigated by using X-ray diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy and electrochemical measurements.When the optimum reaction time is 2 h,the sample can exhibit the best electrochemical properties with an initial discharge capacity of 265 m Ah/g at 0.1C and 180 mAh/g at 2C after 90 cycles,respectively.更多还原